I am curious to know how others are doing with their Mii Plaza games. I will list mine and let me know how well you have managed to go. I doubt I have done terribly well, as I don't get a whole lot o Streetpass hits. Also, I must say, Find Mii is a terrific little free game.
Puzzles completed - 7/18
Pieces Collected - 367/458
Completed Find Mii - 3 times
Completed Find Mii II - onto my second playthrough
Hats Collected - 32
Accomplishments - 32
So go for it, make me envious of those who live in places with lots of Streetpass Hits!